If your iPhone speaker doesn’t seem to be working as well as it used to, there is a good chance that the slot where the speaker resides is dirty. Here’s how to clean it:

  1. Open up the iPhone and remove the battery if necessary.
  2. Use a q-tip or a cotton swab to clean around the speaker hole. Make sure to get inside as well.
  3. Wipe down the area around the hole with a dry cloth if necessary.
  4. Replace the battery and close up the iPhone case ..